

SULPHUROUS ACID AND SULPHITES. 791 



slight increase in weight during the preservative period and a slight 

 increase in the quantity of food consumed. They also show a marked 

 increase in weight during the after period, though the quantity of food 

 consumed is 4 grams less daily than in the fore period and 1 1 grams 

 less daily than in the preservative period. 



The average weight of No. 11 during the fore period is 66.46 kilo- 

 grams, during the preservative period 66.59, and during the after 

 period 66.66 kilograms. The average daily quantity of food con- 

 sumed is 742 grams in the fore period, 754 grams in the preservative 

 period, and 739 grams in the after period. These data show a very 

 slight increase in weight during the preservative period, accompanied 

 by an increase of 12 grams daily in the quantity of food consumed. 

 There is also another very slight increase in weight in the after period, 

 though the quantity of food consumed is 3 grams less daily than in the 

 fore period. The dry food consumed constitutes 1.12 per cent of the 

 weight of the body in the fore period, 1.13 per cent in the preservative 

 period, and 1.11 per cent in the after period. 



The average weight of No. 12 in the fore period is 69.54 kilograms, 

 in the preservative period 69.67, and in the after period 69.66. The 

 average quantity of dry food consumed during the fore period is 659 

 grams, during the preservative period 685 grams, and during the 

 after period 644 grams. These data show a slight increase in weight 

 during the preservative period, accompanied by an increase in the 

 quantity of food eaten. The increase in weight is almost maintained 

 in the after period, while the quantity of food consumed is 15 grams 

 per day less than in the fore period. The amount of dry food con- 

 sumed is 0.95 per cent of the weight of the body in the fore period, 

 0.98 per cent in the preservative period, and 0.92 per cent in the after 

 period. 



Several summaries are submitted, drawn up according to common 

 variations in the data, but only those for Nos. 1 to 6 and 8 to 1 1 will 

 be discussed as representing most completely the two groups taking 

 sodium sulphite and sulphurous acid, respectively. 



The average weight of Nos. 1 to 6 for the fore period is 63.71 kilo- 

 grams, for the three subperiods of the preservative period 62.78, and 

 for the after period 62.28 kilograms. The average quantity of dry 

 food consumed for the fore period is 639 grams, for the preservative 

 period 629 grams, and for the after period 634 grams. The dry food 

 consumed is practically 1 per cent of the body weight for all three 

 periods. 



The summary for Nos. 8, 9, 10, and 11 shows an average weight in 

 the fore period of 61.87 kilograms, in the preservative period 62 kilo- 

 grams, and in the after period 62.07 kilograms. The average daily 

 quantity of food consumed in the fore period is 633 grams, in the pre- 

 servative period 636 grams, and in the after period 635 grams. A 



